Bellyful n. As much as satisfies the appetite. Hence: A great abundance; more than enough. "King James told his son that he would have his bellyful of parliamentary impeachments."
... they can't stop the war. They may be educated, but you're enlightened. They know more books, but you know more life in a minute than they'll ever know—you got a better idea of the what-for in this world. Let 'em write! You fight! If it rests on that hairy bunch to stop the war you'll get a bellyful of fighting. They're just a noisy fringe of buzzers round the ... — The Wrong Twin • Harry Leon Wilson